What potential issues or limitations should be considered when using PDO::pgsqlCopyToArray() in PHP for large data migration tasks?

One potential issue when using PDO::pgsqlCopyToArray() for large data migration tasks is memory consumption. Since the method fetches the entire result set into memory, it can lead to memory exhaustion when dealing with a large dataset. To address this, consider fetching the data in chunks rather than all at once. 

// Example code snippet to fetch data in chunks using PDO::pgsqlCopyToArray()

$chunkSize = 1000; // Number of rows to fetch at a time
$offset = 0;

while (true) {
    $result = $pdo->pgsqlCopyToArray("SELECT * FROM large_table LIMIT $chunkSize OFFSET $offset");
    
    if (empty($result)) {
        break;
    }
    
    // Process the fetched data here
    
    $offset += $chunkSize;
}

Keywords

PDO pgsqlCopyToArray large data migration limitations

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